Horizon 1 1 17 ACLN : Articles dans des revues avec comité de lecture non répertoriées par l'AERES Geoderma 43-58 PATURAGE SOL CULTIVE SOL DEGRADE STOCK ORGANIQUE CARBONE ORGANIQUE RAPPORT C/N VARIATION INTERANNUELLE GEOSTATISTIQUE MARTINIQUE 2000 fdi:010021104 ENG Geoderma 0016-7061 10.1016/S0016-7061(99)00064-6 https://www.documentation.ird.fr/hor/fdi:010021104 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_53-54/010021104.pdf 94 Horizon (IRD) In 1991 in Martinique (F.W.I.), a #Digitaria decumbens$ pasture was established on a vertisol that had supported a market-gardening culture for more than 10 years. Organic matter stock restoration was investigated by measuring carbon contents (C contents) and carbon/nitrogen (C/N) ratios each year from 1992 to 1997. Relations between and soil properties (particle-size distribution, soil depth) and C contents were studied. Furthermore, geostatistical analyses of C contents were realised in order to characterise the C storgae in soil at plot scale. The increase of C contents from 1992 (Y0) to 1997 (Y5) was 5 g C/(kg soil) in the topsoil (0-10 cm) and 2.5 g C/kg soil, or 7.5 Mg C/ha, in the 0-30-cm layer. The intensity of organic C storage had a spatial pattern, although the C/N ratio remained homogeneous across the plot. However, there was no correlation between the C increase and the particle-size distribution or the depth of the soil. In the topsoil, the local variability of the C contents increased with time until 1995 and then there was a gradually spreading of this local variability. Plant-cover distribution and physical structure of vertisol could explain the evolution of spatial structure of the soil C content. (Résumé d'auteur) 068PEDAPP ; 076AGRO